OMAPDSS: HDMI: OMAP4: Remove CEA-861 audio infoframe and IEC-60958 enums

Instead of having its own definitions for CEA-861 and IEC-60958, the HDMI
driver should use those provided by ALSA. This patch removes the definitions
that are already provided by ALSA.

Signed-off-by: Ricardo Neri <ricardo.neri@ti.com>